Crane use and maintenance: lifting equipment to regular professional examinations. Regular inspection and maintenance of equipment used in the process: in the time in a number of machinery and equipment maintenance and repair 65 tons crane to clean, lubricate, adjust, disintegration, maintenance-centric content. Usually by the maintenance personnel and operations personnel work together to complete. Crane Development origin: history. Only slightly Tadano crane 65 tons, the operation difficult. To the 15th century, Italian invented the jib crane, to solve this problem. This crane has roots tilt 65 tons of used crane boom, the arm top is equipped with a pulley, it can lift can be rotated. It was not until the 18th century, a variety of lifting machinery are also used by humans to human, animal powered on starting weight, range and efficiency is very limited.